Tunable aggregation of short-side-chain perfluorinated sulfonic acid ionomers for the catalyst layer in polymer electrolyte membrane fuel cells

被引：13
|
作者：
So, Soonyong [1 ]
Kang, Hongsuk [2 ]
Choi, Dahye [1 ,3 ]
Oh, Keun-Hwan [4 ]
机构：
[1] Korea Res Inst Chem Technol KRICT, Energy Mat Res Ctr, 141 Gajeong Ro, Daejeon 34114, South Korea
[2] Korea Res Inst Chem Technol KRICT, Interface Mat & Chem Engn Res Ctr, 141 Gajeong Ro, Daejeon 34114, South Korea
[3] Sungkyunkwan Univ, Sch Chem Engn, 2066 Seobu Ro, Suwon 16419, Gyeonggi Do, South Korea
[4] Korea Automot Technol Inst, Hydrogen Mobil R&D Ctr, 303 Pungse Ro, Pungse Myeon 31214, Cheonan, South Korea
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2020年 / 45卷 / 38期
基金：
新加坡国家研究基金会;
关键词：
Catalyst layer; Dipropylene glycol; Membrane electrode assembly; Polymer electrolyte membrane fuel cell; Short-side chain ionomer; TEMPERATURE-DEPENDENT PERFORMANCE; TRANSPORT RESISTANCE; NAFION; SOLVENT; IMPACT; MORPHOLOGY; INSIGHTS; BINDERS; SYSTEMS;
D O I：
10.1016/j.ijhydene.2020.05.128
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
We control the aggregation of short-side-chain (SSC) perfluorinated sulfonic acid (PFSA) ionomers for catalyst-layer (CL) inks by using a dispersion solvent of dipropylene glycol (DPG) and water. By increasing the fraction of PFSA backbone preferable DPG content in a dispersion solvent, the size of SSC-PFSA aggregates decreases exponentially from microscale to nanoscale, affecting the catalyst-ionomer agglomerates' size and distribution in the CL inks. The surface morphology and porosity properties of the resulting CL are investigated, and the fuel cell performances are studied at two different humidity conditions (50 and 100% RH). Compared to the previous study with long-side-chain (LSC) PFSA ionomers, the SSC-PFSA ionomers show the optimized performance at higher DPG content, where the solvating power is intermediate for SSC-PFSA ionomers having shorter hydrophilic side chain than LSC-PFSA ionomers. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：19891 / 19899
页数：9
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